Milnor 76028 User Manual

A variety of arrangements.

Each Milnor CBW washer is custom-made for the
customer’s specific needs. More modules give greater
production. Water inlets and drain valves give
greater flexibility. Mentor control allows
predetermined temperature and chemical levels for
each individual bath.

Mentor®Control.

The operator puts a batch in line for loading, then
enters the goods classification number into the
Mentor control. This automatically selects the
processing formula which follows the batch until it’s
automatically unloaded from the dryer and delivered
to its finishing destination.

Loading.

A conveyor or overhead bag system may feed the
load chute.

Washing.

Each module has a stationary shell – to hold the
wash bath – and a rotating, perforated inner
cylinder. Each module can be used for different
baths. Goods proceed through the formula by
traveling from module to module, via a perforated
top transfer scoop. There are no stops and starts for
draining and filling after each bath. This saves time,
compared to conventional washing machinery.

Temperature controls.

Any module can be equipped with a steam inlet
and temperature probe.

Supplies.

Supply inlets can be placed in each module.
The Mentor control dictates the amount of supplies
and when – or if – they are added to the specific
goods in each module during the wash cycle.

Post-wash.

The MultiTrac system relays each batch’s
post-wash requirements to other parts of the system
– extractor, shuttle, dryers, and conveyors.
A CRT display identifies batch location and status.
Where multiple-batch dryers are used, the control
system prevents mixing of incompatible batches in
the same dryer.

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Tunnel washers were developed to save water, energy
and labor, and to expedite the flow of goods through
the laundry. Since they entered the market in the
1960s, they’ve all done this to some degree.

Early tunnel washers were bottom transfer machines.
To move the goods from one stage of the washing
process to the next, they transferred the goods and

ALL the water along the bottom. Even the first

batch

successful

tunnels did this. And today, the

same is still true of some tunnel washers made by
others.

But the Milnor CBW washer has taken tunnel
washing another step forward. This is a top transfer
machine. It lifts and drains the goods before
transferring them into the next processing stage.

This results in a high level of wash quality for
a range of goods – everything from light hospitality

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linen to heavy-soil industrial goods can be laundered
in a Milnor CBW washer.

There are other features that set a Milnor CBW
washer apart from other tunnels – such as modular
construction and double drum characteristics
throughout. What distinguishes a Milnor tunnel
washer from the competition are better dilution,
higher wash quality and more rugged construction.

Top transfer increases productivity.

Milnor top transfer CBW washers have proven higher productivity in more than 1,300 installations worldwide. They wash faster than other tunnel washers due
to superior dilution – which means better soil removal. This yields two major advantages:

B More production in a given number of compartments, or…
C Fewer compartments to achieve the same production. Both of these advantages save wear and tear on the goods.

’s better washing quality – and higher productivity – result from:

Milnor

•Better dilution. •Better wash liquor penetration. •Better mechanical action. •More cylinder space.

Better dilution means

processing.

The proven result of all of this:

Dilution is far greater in a Milnor than in other tunnels.

That’s the main reason Milnor can wash and rinse more quickly,

and why Milnor can also wash heavily soiled goods so well.

Why Goods Get Cleaner Faster
With Total Top Transfer.

Linen see cleaner water in the next bath - for better dilution. Note bath separation.

Milnor’s perforated top transfer scoop leaves dirty water behind.

How transfer affects dilution.

A tunnel washer’s transfer method is critical, because it’s the way the machine
introduces each batch of goods to its next bath. And, of course, dilution will be
best served if the next bath has cleaner water.

Milnor transfers each batch by lifting the goods out of the water, draining the
free water, then sliding the goods into the next compartment. Goods are
immediately exposed to cleaner water. Only the water trapped in the goods moves
forward – most dirty water is left behind. Milnor leaves back approximately half
of the total water in each compartment.

Other tunnels transfer by forcing the goods and the dirty water forward, generally
along the bottom of the tunnel. Instead of a cleaner bath upon transfer, goods
are exposed to the same dirty water that was in the previous bath!

That’s why, at the unload end of a Milnor CBW washer, there’s hardly any free
water when the goods transfer into the press. Other tunnels have a wave of water
splashing into the press, along with the goods. And what happens at the end
happens in every other compartment of the machine, as well.

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You can see the effect of total top transfer vs. other
methods by using buckets of water to simulate
different compartments. A Milnor loading scoop lifts
the goods, drains them, and deposits them into
cleaner water.

Other tunnels send dirty water into the next
compartment, along with the goods.There’s no
dilution as the whole compartment moves forward.

MILNOR’S DILUTION ADVANTAGE

Top transfer gives better
control of chemicals.

Milnor’s top transfer feature assures bath integrity.
Baths are truly independent, so the washing formula
can work as planned.

Because water is not pumped forward with each
transfer, chemicals are better targeted to the
proper baths. They don’t migrate uncontrollably to
subsequent baths. Titrations show that with a Milnor,
it is far easier to control pH.

What is

“True Top

Transfer”?

To acheive all of the benefits

of True Top Transfer,

a tunnel washer must include:

1. A scoop that lifts each batch out of the
water and transfers it to the next chamber.

2. Perforations in the lifting scoop that allow
almost all of the “free water” (the water not
trapped in the goods) to flow back into the
original module and not be carried forward
with the load.

The results are clear.

Dilution is the way goods are washed. It’s always been
true of conventional washers and washer-extractors.
It’s also true of tunnel washers. Time, temperature,
chemicals and mechanical action are essential
elements of the washing process. These four things
loosen soil from the goods and dissolve/suspend

What about counterflow?

Counterflow – water moving against the direction of
the goods – also achieves dilution. With counterflow,
a tunnel washer would get almost the same dilution
as a washer-extractor gets with one dump and fill,
using reuse water. This is true of both the Milnor top
transfer washer and other tunnels. But a Milnor
CBW washer, with its perforated top transfer scoop,

the soil in water. But these four catalysts can only
remove soil if water

– successive baths, each with cleaner water,
each replacing dirtier water. Without dilution, the
dirt cannot be removed from the linen.

goes a big step further. The goods change baths upon
transferring. So, again except for reusing the water
over and over in each module, Milnor achieves
approximately the equivalent of a second dump
and fill – and about twice the dilution of some other
tunnels.

TOP TRANSFER AT WORK:

washes it away. That’s dilution

This video
sequence shows
how Milnor
leaves dirty
water behind.

3. A solid partition between modules
to completely separate chemical baths.

4. No perforations in the partitions so bath
integrity is maintained at all times.

5. The partition should be fixed to the outer
drum so that no sliding seals are required
to completely separate baths.

6. All flow between modules should be
external, so flows can be changed on
command when necessary and proper water
levels can be maintained.

Compare Titrations

HIGH

Chemical Concentrations

LOW

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15-Compartment Bottom Transfer Tunnel

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9-Module Milnor CBW Washer

Washer-Extractors

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Note the similarity between titration curves
of a washer-extractor and a Milnor CBW washer.
In both, chemical concentrations are high where
soil is heaviest. Then, concentrations drop sharply
in the next stage of the formula as soil is removed.

Compare this to a bottom transfer tunnel’s

flatter curve: Lower peak concentration

where chemicals are added

(because so much water has
been transferred from previous compartments),
and spillover of chemicals in subsequent stages
(where a washer-extractor and a Milnor CBW
washer have already removed most chemicals).